Lock



Nov. 3, 1936. I JACOB] 2,059,694

' LOCK Filed Nov. 50, 1928 Illl [7/1 Patented Nov. 3, 1936 UNITED STATES PATENT QFFI'CE LOCK Application November 30, 1928, Serial No. 322,890

10 Claims.

This invention has as an object the provision of new and simplified means for maintaining a lock cylinder .assembled in its mounting member or head.

Another object of this invention resides in the provision of a lock of the character described having means for maintaining the lock cylinder assembled with the mounting member or head which means may be actuated to permit the ready authorized removal of the lock cylinder from the mounting member.

Another object of this invention resides in the provision of a lock of the character described in which simplified means are provided for maintaining the lock cylinder assembled with the mounting member and which may be actuated to permit the removal of the lock cylinder when turned by a proper key to a predetermined intermediate position.

And a more specific object of this invention resides in the provision of a lock having a spring urged plunger or detent finger carried by the lock cylinder and engageable in an annular groove in the mounting member and which may be moved to an inactive position when the cylinder is turned to a predetermined position with respect to the mounting member.

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illustrated several complete examples of the physical embodiment of my invention constructed according to the best modes I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is an end view of a lock embodying my invention with parts broken away and in section to illustrate structural details;

Figure 2 is a transverse, sectional view taken through Figure 1 on the plane of the line 2-2;

Figure 3 is a view similar to Figure 1 illustrating a slightly modified form of my invention;

Figure 4 is a view, partly in section and partly in elevation, taken through Figure 3 on the plane of the line 44, and

Figure 5 is a cross sectional view taken through the forward end of the lock illustrating another modified form of my invention.

Referring now more particularly to the accompanying drawing in which like numerals designate like parts throughout the several views, 5 represents the mounting member or head of a conventional lock having a longitudinal bore 6 extending therethrough to rotatably receive .a lock cylinder 1. The lock cylinder has a plurality of tumblers 8 which, when in looking position, are received in a longitudinal locking groove or channel 9 formed in the mounting head in communication with the bore 6. The tumblers 8 are spring urged to engage their locking ends in the groove or channel 9 in the periphery of the lock cylinder by the insertion of a proper key Ill, thus permitting free rotation of the lock cylinder.

The forward end of the mounting head 5 is provided with a counterbore H to receive the horizontal or annular flange l2 of a cap member 13 stamped from relatively hard metal to protect the lock cylinder against destruction and is engaged over its forward end being secured thereon in a novel manner now about to be described.

The lock cylinder 1 is insertable in its mounting head 5 from the forward end and is restrained against displacement therein by a pair of plungers or detent fingers l4 slidably mounted in parallel bores or pockets l5 formed in the lock cylinder at opposite sides of its key slot l6. The bores or pockets I5 extend inwardly from the periphery of the lock cylinder in opposite directions and are spaced from the forward end of the cylinder a distance substantially half of the depth of the annular flange l2 of the cap member 13.

The plungers I l have their outer ends reduced, as at H, topass through apertures [8 formed in the flange l2 of the cap member in alignment with the bores l5 and thus maintain the cap member secured on the end of the locking cylinder. The shoulder formed on the plungers by the reduced ends is engageable with the inner surface of the cap member flange to limit outward move ment thereof by action of their urging springs I!) which are confined between the ends of the bores or pockets l5 and the ends of the plungers.

In assembling the lock cylinder and its cap member with the mounting head, the plungers I4 are held in their retracted positions to permit the same to enter the counterbore I! in the forward end of the mounting head and after the lock cylinder has been moved to its proper longitudinal position in the mounting head, the reduced ends I! of the plungers are aligned with an annular channel 26 extending from the counterbore ll, into which they are extended by their urging springs l9 thus maintaining the lock cylinder and its cap against removal from the mounting head.

Figure 1 illustrates the lock cylinder turned to an intermediate position aligning the plungers M with a pair of apertures 2| in the mounting head and communicating with the annular channel 20 whereby the plungers may be retracted against their urging means by the insertion of proper tools through the apertures 21 to permit the removal of the lock cylinder from the mounting head.

In Figures 3 and 4, a slightly modified form of my invention is illustrated in which the plunger 14 not only serves as a means for maintaining the lock cylinder in its mounting member, but also provides a stop for limiting the movement of the lock cylinder in the mounting member. In this form of my invention, the lock cylinder 1 has but one plunger and its bore l 5 is disposed at an angle to the key slot IS. The end of the plungers reduced end I? is preferably cut on an angle, as at 22, to ride within an annular groove 23 which does not however, extend around the entire periphery of the mounting head but terminates at points 24 and 25 to define definite limits of movement for the lock cylinder. An aperture 26 communicates with the channel or groove 23 to permit means to be inserted into the channel to retract the plunger l4 within the periphery of the lock cylinder and thus permit the removal thereof from the mounting head.

Figure 5 illustrates another modification of my invention and in this instance the plungers M are replaced by a detent finger 21 which is stamped from a fiat piece of metal and is reoeived in a recess 28 formed in the lock cylinder 1 at one side of its key slot 5 and in communication with an annular groove or channel 29 formed in the lock cylinder. The annular channel 29 extends around the entire periphery of the lock cylinder and is positioned preferably adjacent the forward end of the mounting head 5 to receive a spring 30 which has one end directed radially and inwardly, as at 3i, to engage a corner 32 formed in the detent 21 by a notch 33 therein which extends inwardly from its outer edge. The spring 30 being in tension thus maintains the detent 21 in its position illustrated in Figure 5 with its outer end 34 extended beyond the periphery of the lock cylinder and into an annular chan' nel or groove 35 formed in the mounting head in alignment with the groove 29.

In this manner, the detent 21 maintains the lock cylinder assembled with the mounting head and when it is desired to remove the lock cylinder, the cylinder is moved by its key to its intermediate position illustrated and a wire or suitable tool, not shown, inserted through an aperture 36 in communication with the channel 35 to depress the end 34 of the detent 2'! within the periphery of the lock cylinder. Movement of the detent to this position causes the end 3| of the spring 30 to engage the notch or recess 33 and hold the detent in a position with its end 34 disposed within the periphery of the lock cylinder to permit ready removal thereof from the mounting member.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of this character appertains, that I provide simple and efficient and inexpensive means for maintaining the lock cylinder of a lock assembled with its mounting head and in which the removal of the lock cylinder from the mounting head for repair or the like may be readily accomplished without in any way destroying or mutilating the structure.

What I claim as my invention is:

1. In a lock device having a mounting member provided with a recess having an aperture leading therefrom to its exterior, a lock cylinder movable in the mounting member between definite limits, a spring pressed detent carried by the lock cylinder and having a portion yieldably retained in the mounting member recess to cooperate with the recess and limit the movement of the cylinder in the mounting member between said definite limits, and said detent registering with said aperture when the cylinder is in a predetermined position whereby a tool may be inserted to free the detent from the recess and permit the ready removal of the cylinder from the mounting member.

2. In a lock device having a mounting member provided with a bore and an abutment, a lock cylinder movable in the bore, a cap engageable over the outer end of the cylinder, a spring pressed detent carried by the cylinder and projectable through the cap to engagement with the mounting member abutment to retain the cylinder within the mounting member and the cap on the cylinder.

3. In a lock device having a mounting member provided with a bore and an abutment, a lock cylinder movable in the bore, a cap engageable over one end of the cylinder, a spring pressed detent carried by the cylinder and projectable through the cap to engagement with the mounting member abutment to retain the cylinder within the mounting member and the cap on the cylinder, and means whereby said detent may be freed of the mounting member abutment to permit removal of the cylinder from the mounting member when the cylinder is in a predetermined position.

4. In a lock device having a mounting member provided with a bore having an abutment and a lock cylinder movable within the bore in the performance of its locking function, the cylinder having a slot in one side, a flat detent movable in the slot, spring means normally urging the detent into the path of the abutment to prevent the detachment of the cylinder from the mounting member, means permitting the movement of the detent against the action of said spring to a position free of the abutment when the cylinder is in a predetermined position, and means whereby the spring maintains the detent in said free position.

5. In a lock device having a mounting member and a lock cylinder member movable therein between predetermined limits in the performance of its normal locking function, yieldable means carried by one of said members and engageable in a channel in the other member for limiting the movement of the lock cylinder member in the performance of its normal locking functions to said predetermined limits and maintaining it assembled with the mounting member, and means whereby said yieldable means may be moved to an inactive position to permit disassembly of the members.

6. In a lock device having a mounting member and a lock cylinder member movable therein between predetermined limits in the performance of its normal locking function, a spring pressed member carried by said lock cylinder member and engageable in a channel in the mounting member for limiting the movement of the lock cylinder member in the performance of its normal locking function to said predetermined limits, said spring pressed member being cooperable with said channel member whereby to prevent outward movement of said cylinder member from said mounting member, and means whereby in one position of said cylinder member relatively to said mounting member, said spring pressed means may be moved to an inactive position to permit disassembly of the members.

7. In a lock structure, a mounting unit, a looking unit movable therein in the performance of its normal locking functions, and cooperating abutments carried by the units for limiting movement of the locking unit in the mounting unit and removably securing the locking unit in the mounting unit, one of said cooperating abutments being movable to inactive position by a tool inserted in one of the units when the units are in predetermined relative positions to disengage the abutments and release the locking unit for removal.

8. In a lock structure, a mounting unit, a looking unit movable therein in the performance of its normal locking functions, a locking bolt carried by the locking unit and normally engaged in a recess in the mounting unit to define the normal limits of movement of the locking unit, disengagement of the locking bolt out of the mounting unit recess releasing the locking unit for withdrawal from the mounting unit, and means whereby the locking bolt may be disengaged from the mounting unit recess.

9. In a lock structure including a mounting unit and a locking unit movable therein between predetermined limits, releasable means for maintaining the units assembled, said means serving to define the limits of movement of the locking unit and being releasable when the units are in predetermined relative positions, and means whereby said member may be released to efi'ect disassembly of the units from the exterior of the mounting unit.

10. In a lock structure, a casing, a barrel movable in thecasing, a locking bolt carried by the barrel and engageable with a recess in the casing to define the limits of movement of the barrel in the casing, said locking bolt being yieldably maintained in operative position, and means whereby the locking bolt may be moved to inoperative position to release the barrel for withdrawal from the casing when the same is in a predetermined relative position with respect to the casing.

EDWARD N. JACOBI. 

